Qinghai-Tibet Plateau, ChinaReference
Yafeng, S., Tandong, Y. and Bao, Y. 1999. Decadal climatic variations recorded in Guliya ice core and comparison with the historical documentary data from East China during the last 2000 years. Science in China Series D - Earth Sciences42 Supp.: 91-100.

Description
Temperatures were inferred from δ18O data obtained from the Guliya ice cap (35.2°N, 81.5°E) in the Qinghai-Tibet Plateau of China. The Medieval Warm Period occurred between AD 970 and 1510.